Abstract: In this paper, a training platform of manual welding process was designed to solute the problem of how to evaluate welding operation level in visual welding simulation system, including simulating welding torch, simulating test plate, image detection module, angle sensor, the master computer and evaluation system. Therefore, the dynamic track location could be captured during manual welding process. Five aspects were considered for path analysis and evaluation methods in the welding operation: straightness, homogeneity, uniformity, weld edge retention time and similarity, in order to ensure the weld straightness and control principle of welding speed. The computer programming had been embedded into the visual welding simulation system which could run smoothly. The results can objectively evaluate the technical level of welding operators.